تفاعل #77532

معادلة التفاعل

(2R)-2,3,8,9-tetrahydrofuro[3,2-f][1,4]benzodioxin-2-ylmethyl 4-methylbenzenesulfonate

2,3-dichloro-5,6-dicyano-1,4-benzoquinone

→

title compound

2,3-Dihydrofuro[3,2-f][1,4]benzodioxin-2-ylmethyl 4-Methylbenzenesulfonate

المذيبات

benzene

ظروف التفاعل

المعالجة

1. 1
   أخرىThe solvent was removed in vacuum
2. 2
   أخرىthe residue column chromatographed on silica gel with methylene chloride as eluant
3. 3
   تركيزconcentrated in vacuum

الإجراء التجريبي

A solution of 0.54 g (0.67 mmole) of (2R)-2,3,8,9-tetrahydrofuro[3,2-f][1,4]benzodioxin-2-ylmethyl 4-methylbenzenesulfonate and 0.46 g (2.0 mmole) of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone in 20 ml of benzene was refluxed under nitrogen for 15 hours. The solvent was removed in vacuum and the residue column chromatographed on silica gel with methylene chloride as eluant. The product fractions were combined and concentrated in vacuum to give 0.40g of the (R)-enantiomer of the of the title compound as a tan solid. 1H-NMR (CDCl3): doublet 7.8 δ (2H); doublet 7.52 δ (1H); doublet 7.3 δ (2H); doublet 6.95 δ (1H); doublet 6.8 δ (1H); doublet 6.65 δ (1H); multiplet 4.5 δ (1H); multiplet 4.25 δ (3H); doublet of doublets 4.1 δ (1H); singlet 2.4 δ (3H).

المصدر